Centrifugal pump.



C. L. REED. yCENTRIFUGAL PUMP.

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CLIFFORD I1. REED, 0F PORTLAND, OREGON.

CENTRIFUGAL PUMP.

Specification of Letters Patent.

Patented J une 6, 1916.

Application filed November 8, 1913. Serial No. 799,902.

To all whom t may concern.'

Be it known that I, CLIFFORD L. REED, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented a new and useful Centrifugal Pump, of which the following is a specification.

The present invention appertains generally to pumps, and more particularly to that class of centrifugal pumps embodying a rotary suction pipe having a radial eduction arm or branch, whereby when the suction pipe is rotated, the centrifugal action of the water or liquid within the said arm or branch, will serve to raise the water through the pipe.

It is the object of the present invention to provide a novel and improved pump of the character indicated, which will be comparatively simple and inexpensive in construction, as well as being simple, practical and eicient in operation.

Among its specific objects, the present invention aims to provide a unique eduction arm or branch for the rotary suction pipe, in order that a liquid seal may be provided, thereby eliminating the liability of the vacuum to be broken between the column of liquid within the eduction pipe proper, and the column of liquid within the eduction arm or branch.

With the foregoing general and specific objects outlined, and with other objects in view, which will be apparent as the nature of the invention is better understood, the present invention resides in the combination and arrangement of parts and in the details of construction. hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention has been illustrated in its preferred embodiments in the accompanying drawing, wherein Figure 1 is a side elevation of the improved pump, portions being shown in section, andthe catchY basin for the eduction arm being shown in section. Fig. 2 is a view similar to Fig. 1, illustrating a modiication in section, the catch basin being removed. Fig. 3 is a plan view of either .of the eduction pipes illustrated in Figs. 1

Aand A2.,

suitable supporting structure, (not shown.)

'.Ihe upper end portion of the suction pipe 1 1s curved gently outwardly or radially, to provide the eduction arm or branch 3 turned to one side on a comparatively large arc, it being understood that the number of eduction arms 3, may be increased, ifdesired, and without in any manner altering the operation of the pump.-

A cardinal or salient feature of the invention resides in the fact that the free end portion of the eduction arm is recurved or directed toward the aXis of the main or body portion of the suction pipe 1, to provide the bend 5. The recurved nozzle 4 is of advantage as hereinafter described.

The lower end of the suction pipe 1 is submerged in the water or liquid to heelevated, and a valve casing 7 is carried by the lower end of the suction pipe 1, the upper end vof the valve casing 7 being contracted, as at 8, and vsecured upon the end of the pipe 1. The casing 7 is provided with a lower contracted inlet opening or port 9, forming the conical valve seat 10, a ball valve 11 being disposed within the casing 7 to seat uponthe seat or shoulder 10 to prevent the egress of the liquid from the suctionpipe. The valve 11 being of the check valve type will permit the liquid to be readily drawn into the suction pipe 1, as will be apparent,rit being preferable` to provide a cross rod 12 within the casing 7 to limit the upward movement of the valve 11 so as to prevent the same from being sucked against the end of the suctionpipe 1, as might prove detrimental.

The suction pipe 1 is rotated by means of a -pulley wheel 6 keyed thereon, the pulley wheel 6 preferably resting upon one of the bearings 2, to support the suction pipe. It is evident that the pulley wheel 46 may be belted to a power pulley, or that the suction pipe 1, may be rotated in any other suitable manner.

As a convenient means for catching the water or liquid from the eduction arm, there is provided an annular transversely curved basin or gutter 13, the inner wall 14 of which is upturned and provides a relatively large opening within which the basal portion of the eduction arm 3 rotates, the nozzle 4being arranged to rotate directly above the basin 13. The outer wall 15 of the basin is extended upwardly above the inner wall 14 to inclose the free portion of the eduction arm, and has its upper end contracted gently to provide the inwardly curved overhanging rim 16. The free end of the nozzle 4 is inclined, and the rim 16 and nozzle 4 are similarly curved. The discharge pipe 17 is connected to the bottom of the basin or gutter 13 to carry oif the water or liquid it being understood, however, that the basin may be eliminated, and other means may be provided for catching and carrying off the liquid discharged by the pump. The rotary vertical suction pipe 1 is arranged below and coaxial with the basin 13, the upper end of the pipe 1 having the arm 3 projecting upwardly through the opening formed by the inner wall 14 of the basin and curved upwardly immediately over the said inner wall 14. The eduction arm 3 is provided at its free end with the upwardly projecting recurved nozzle, as above indicated, which nozzle is disposed above the basin 13 and works below the rim 16.

In operation, the pump is first primed by drawing a column of liquid up the suction pipe, to the nozzle 4, which may be accomplished in a convenient manner by applying a suction device to the nozzle 4. After the pump has been primed, the check yvalve 11 will support the column of water within the suction pipe, as will be apparent. The suctio'n pipe 1 is then rotated with sufficient velocity, in order that the centrifugal action of the liquid within the eduction arm 3 will be sufficient to overcome the weight of the column of liquid within the suction pipe 1 proper, thereby causing the liquid to be discharged from the eduction arm, and multaneously elevating the liquid up the suction pipe.

Particular attention is directedto the fact that the recurved nozzle 4 will cause the liquid within the nozzle to have a centrifugal action toward the bend 5, or against the centrifugal action within the eduction arm 3 roper. In this manner, a liquid seal is effected at the bend 5, which will eradicate the tendency of the air to leak into the eduction arm, thereby destroying the vacuum, which is essential to the operation of the pump. It will therefore be understood, that the suction pipe must be rotated at a suiiicient speed, in order that the centrifugal action of the water within the body of the eduction arm 3, will be greater than the combined weight of the column of water within the body of the suction pipe 1, and the slight centrifugal action of the water within the nozzle 4.

As the rotation of the suction pipe is continued, the water or liquid will be drawn upwardly therethrough, and will be discharged from the nozzle 4 over the sides of the nozzle, so as to gravitate into the basin or gutter 3, from whence the water or liquid may be drawn off to the desired point.

Particular attention is directed to the fact that the free end of the nozzle 4 being inclined, the nozzle and rim 16 being similarly curved, and the basin or gutter 13 being transversely curved, will reduce to a minimum, the splashing of the water, whereby the pump will operate with a smooth and even action. The interior of the basin is also readily visible and accessible from the top, and the action of the water may be readily observed. Attention is also directed to the fact that the eduction arm 3 in being curved directly over the inner Wall 14 of the basin 13, will limit the downward flexing movement of the eduction arm 3, under the great strain to which the eduction arm is subjected when the suction pipe 1 is rotated at a high velocity. Furthermore, the eduction arm 3 being curved gently and being turned to one side on a comparatively large arc, will reduce the friction of the water passing from the suction pipe through the eduction arm, to a minimum.

In the form illustrated in Fig. 2, the suction pipe is split intermediate its ends to provide the upper section 1 having the eduction arm 3, and the lower section 1 bearing the valve casing 7 with the check valve therein. The upper section 1 of the suction pipe is journaled through the supporting bearings 2, while the lower section 1 has its upper end engaged to a stuffing box 18 containing packing 19, the lower end of the section 1, being received by the packing 19 within the stufiing box 18, and a gland 2O engaging over the lower end portion of the section 1 and entering the stuifing box to compress the packing. 'Ihe gland 20 is preferably connected to the stuffing boX 18 by means of draft bolts or the like, in order that the packing 19 may be compressed against the lower end of the section 1y to sealV the joint between the suction pipe sections. Thus, the upper section 1 will be free to rotate, while the lower section 1 remains stationary, the action or operation of the pump being precisely the same as that above described.

From the foregoing, the other advantages and capabilities of the present invention will be apparent to those versed in the art, it being noted that the objects aimed at have been carried out in a satisfactory manner.

Having thus described the invention, Y

pipe having a gently curved eduction arm at its upper end turned to one side on a comparatively large arc, the said eduction arm having an upwardly projecting recurved nozzle-at its free end, and the free end of the nozzle being inclined.

2. In a centrifugal pump, an annular transversely curved basin having its outer wall extended upwardly above the inner wall, the upper end of the said upwardly extended outer wall being contracted gently to form an inwardly curved rim, the basin having a lower outlet, and a rotary member formed from a single length of piping and embodying a straight vertical suction pipe arranged below and coaxial with the basin, said pipe having a gently curved eduction arm at'its upper end turned to one side on a comparatively large are immediately over the inner wall of the basin whereby the edge of the said inner wall serves as a means for supporting the said arm when it lexes, the said eductlon arm having an upwardly projecting recurved nozzle at its free end, said nozzle being disposed above the basin and arranged to work below the said rim, and the rim and nozzle being similarly curved.

8. In a centrifugal pump, an annular transversely curved basin, and a straight vertical rotary suction pipe below and coaxial with the basin, said pipe. having an eduction arm at its upper end curved to one side on a comparatively large arc, the free end of said arm being curved upwardly, the outer wall of said basin being extended upwardly to conne the eduction arm therein, and the inner wall of the basin being extended upwardly to a point immediately below the path of rotation of said arm, whereby should said arm bend downwardly due to centrifugal action, it will be supported rotatably by the inner edge of the inner wall of said basin.

In testimony that I claim the foregoing as my own, I have hereto alixed my signature in the presence of two witnesses. f

CLIFFORD L. REED.

Witnesses:

ORLANDO J. FERRIs, SYLvns'rER A. MGCARTNEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. c. 

